I heard years ago an LP high efficiency boiler needs full 3/4", not quite sure if it was a tale or not. if the pressure drop is under an inch, does one still need to bump it up to 3/4" ? It's a hypothetical question, so if you ask mt 'how long', lets go with '10 feet of gas pipe', and, lets go with '80,000 BTU boiler'. Thanks for your comments
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